I think the issue is that a lot of concerns that appear to be "cross-cutting" at first glance, don't hold true to that design... but teams will try to stay the course, possibly due to existing debt, and it goes south pretty quickly from there. That's what I mean when I say there are some patterns that are obvious and proven cross cutting concerns (like logging), but there's really not a ton of them IMO, and if you're going to experiment with new potential concerns, then you must be ready to rip it up when it proves not to be the shape you thought it was.